Hot-air furnace.



PATENTED MAR. 24,;1903.

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W G REYNOLDS. HOT AIR FURNACE. urmomum rIL'nn SEPT. 10, 1902.

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'ifizemnseuf UNIT-ED STATES "PATENT OFFI E- WILLIAM C. REYNOLDS, OF'SPRINGFIEL'D, OHIO, ASSIGNOR OF ONE-HALF T GEORGE H. FOUTS, OF DAYTON, OHIO. I

H QT-AlR-FURN ACEQ srnorrloa'rion formingpart Cit Letters Patent No. 723,308, dated March 24, 1903'.

' l Application filed September 10, 1902. Serial No. 122,767. (No model.)

To all whom/it may concern:

Be it known that I, WILLIAM C. REYNOLDS,

a citizen of the United Stat es, residing at- Springfield,cou n-ty of Glark',and State of Ohio, have invented certain new and useful Improvements in Hot-Air Fu rnaces, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specificacation. i

My invention relates to hot-air furnaces in which either coal or gascanbe employed for the heating; and it consists of the certain novel construction and arrangement of parts,

to be hereinafter particularly pointed out and claimed.

In the drawings, Figure 1is a top plan View of my improved furnace, showing the fines in dotted lines. Fig. 2 is a vertical section of same, taken on the lines 2 2 of Fig. 1. Fig. 3 is a similar section taken on lines 3 3 of Fig. 1. Fig. 4 is a perspective view of the furnace and easing.

A is the furnace proper or heater oblong in shape and provided with the fire-pot B, suitably lined, the grate-bars O, and ash-pit D. E is the combustion-chamber, provided at its rear end with the smoke-collar a for conducting the smoke and products of combustion to the chamber F, connected laterally i with the smokeretaining fines G. The combustion-chamber E is constructed somewhat wider than the fire-pot, leaving a shelf 1) b on each side runninglengthwise of the'chamher, and upon these shelves at each side are located the gas-burners H H. These burners are of any well-known construction, supplied with gas through pipe 0 and provided with a horizontal partition (1, open at each end to compel the mixture of gas and air to traverse the length of the burner before exit through V the series of openings e, where it'is ignited.

The smoke-retaining fiues G consist of a series of narrow rectangular passageways b' b, extending vertically the height of the chamberF and leadinglaterallyinto the side chamber L. This side chamber L extends the'entire length ofthe furnace and has aseries of similar narrow rectangular passage-ways g g and h h, leading back and opening into the middle chamber M above the combustionchamber. At the front end this side chamber L is also connected by similar narrow rectangular passage-ways Zlwith the smokeflue N, which opens into the smoke-pipe P through the collar m. Theside chamber L isdivided medially by the partition -n, closed by damper 19, so thatwhen the damper is closed the smoke and products of combustion travel from the chamber Fthrough flues 6o b b to chamber L, through fines g g to chamber M, then back through fines h hto L, and thence-through flues Z Z to the smoke-flue N and pipe P. To obtain a more direct draft, the damper p is opened to permit the smoke entering chamber L to pass directly through fiues Z Z to the smoke-pipe. Doors are provided in the outside wall of the chamber L to permit ready access to the smoke-retaining fines.

The furnace is provided withthe casingR, inclosing the heater and smoke-fines, and the cold air is supplied to the interior ofthis casingthrough the cold-air duct 'S, whence it passes around the furnace and up betweeu the smoke-retaining fines and becoming thoroughly heated passes to the hot-air flues through the openings .9 s in the top of the easing R. The casing fits around the openings into the fire-pot and ash-pit of the heater, and then openings are closed by the usual doors if u.

By my arrangement and disposition of smoke-fines, under whieh'the heated smoke is compelled to pass hack and forth from the compartment L to compartment M before passing into the smoke-pipe, the heat from the smoke and products of combustion is radiated through the thin metallic walls of the smoke-retaining fines, and the superficial area of these fines is so large that practically all the'heat of the smoke is utilized in heating the incoming cold air surrounding them.

For the purpose of cleansing the smokefines the outside wall of the chamber Lis pro-, 5

vided with doors to furnish easy access to the fines.

Having thus described myinvention, what I claim, and desire to secure by Letters Patent, isv 1. In a hot-air furnace, the combination with a heater and smoke-pipe therefor, of a series of narrow, rectangular, laterally-disposed smoke-retai'niug flues, smoke-chambers at each end of said fiues, with partition and damper therefor for compelling the smoke to travel from one chamber to the other and back, said chambers and fines being interposed between the heater and smoke-pipe and a casing for cold air surrounding same, substantially as shown and described.

2. In a hot-air furna'ce, the combination, with an oblong heater, with smoke-exit at the rear end, and smoke-pipe at the front end of smoke-chambers above and at the side of said heater and a series of narrow rectangular laterally-disposed flues connecting said smoke chambers and pipe and a side chamber connecting with said flues,with partition and damper in the side chamber for compelling the smoke to traverse all of said fines, and a casing for cold air surrounding said lines and chambers, substantially as shown and described.

' WILLIAM C. REYNOLDS. \Vitnesses:

GEORGE HENKEL, W. A. HILLERMAN. 

